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Overpowering Speakers?
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<blockquote data-quote="eharri3" data-source="post: 5705243" data-attributes="member: 591579"><p>In my opinion there's alot of misinformation out there about the importance of matching rms ratings geared towards newbies buying cheap chain store equipment with low limits who would otherwise end up playing with more power than they know how to safely deliver. The easiest thing for the store to tell them to make sure they don't keep returning blown speakers is to match rms ratings as closely as possible.</p><p></p><p>Power ratings are arrived at using conditions completely different from what happens when you play music. The RMS rating of a speaker and the rms rating of an amp mean almost nothing when making these decisions if you take into account the fact that you can control an amplifier's power delivery and that a speaker never sees, nor does an amp deliver, ANY amount of power for more than a second or two while playing a song. No matter how much power you're running, at any given point a speaker may be seeing as few as 5-10 watts, or maybe up to half your amp's max rating at higher volumes. If you crank it regularly you may see your amp's rated output for occasional bursts during your music. Or if you tune your gain text book style and never go to your max undistorted volume and keep it there you will probably NEVER see all of the power an amp is rated for.</p><p></p><p>As long as it's clean power overheated voicecoils are not a likely problem, overdriving the speaker will probably be the bigger issue. I'd set the gains textbook style then start listening with high volume and backing off accordingly. You may find the mechanical limits of the speaker are such that you can deliver every bit of that 150 watts or you may need to back off slightly on the gain. But there's people out there running 2-3 times a speaker's rms rating and not having a problem. It's all in buying good speakers with high limits, listening for your system's limits and making gain adjustments.</p><p></p><p>It is not any relationship between rms ratings that kills a speaker, it's what the user does with the controls. And more power is usually better. It gets you more volume during normal listening and cleaner peaks without having to overlap gains and cheat yourself out of some undistorted volume just to get your music to play loud enough at a reasonable volume level. I plan to run amps making AT LEAST double my driver's rms ratings in my next setup.</p></blockquote><p></p>
[QUOTE="eharri3, post: 5705243, member: 591579"] In my opinion there's alot of misinformation out there about the importance of matching rms ratings geared towards newbies buying cheap chain store equipment with low limits who would otherwise end up playing with more power than they know how to safely deliver. The easiest thing for the store to tell them to make sure they don't keep returning blown speakers is to match rms ratings as closely as possible. Power ratings are arrived at using conditions completely different from what happens when you play music. The RMS rating of a speaker and the rms rating of an amp mean almost nothing when making these decisions if you take into account the fact that you can control an amplifier's power delivery and that a speaker never sees, nor does an amp deliver, ANY amount of power for more than a second or two while playing a song. No matter how much power you're running, at any given point a speaker may be seeing as few as 5-10 watts, or maybe up to half your amp's max rating at higher volumes. If you crank it regularly you may see your amp's rated output for occasional bursts during your music. Or if you tune your gain text book style and never go to your max undistorted volume and keep it there you will probably NEVER see all of the power an amp is rated for. As long as it's clean power overheated voicecoils are not a likely problem, overdriving the speaker will probably be the bigger issue. I'd set the gains textbook style then start listening with high volume and backing off accordingly. You may find the mechanical limits of the speaker are such that you can deliver every bit of that 150 watts or you may need to back off slightly on the gain. But there's people out there running 2-3 times a speaker's rms rating and not having a problem. It's all in buying good speakers with high limits, listening for your system's limits and making gain adjustments. It is not any relationship between rms ratings that kills a speaker, it's what the user does with the controls. And more power is usually better. It gets you more volume during normal listening and cleaner peaks without having to overlap gains and cheat yourself out of some undistorted volume just to get your music to play loud enough at a reasonable volume level. I plan to run amps making AT LEAST double my driver's rms ratings in my next setup. [/QUOTE]
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